Question

If P(x) = ax 3 + bx - 3 and P(-1)-0, then the value of P(1) is:

(a) -6
(b) -3
(c) 3
(d) 6

Answer 1

(a) -6

Explanation:

P(x) = ax^3 +bx - 3

• P(-1) = -a-b-3 = 0
• therefore a+b=-3
• P(1) = a+b-3
• P(1) = -3 - 3 = -6
• (a)